REVERSIBLE-FLOW FILTER WITH SCAVENGING DEVICE
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United States of America Patent
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Issued Date -
Nov 21, 2013
app pub date -
Jan 24, 2012
filing date -
Feb 4, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A reversible-flow filter with a filter insert in a filter housing, the inner space of which being connected to a fluid inlet, an outlet and a backwash device being rotatable and having a backwash body with a washing gap, reaching near the surface of the filter wall, for cleaning off the filter wall in backwash operation. The backwash device is coupled at one axial end to a rotary drive and at its other end to a sludge discharge. The backwash body having a suckaway slot openable into the inner space, separate from the washing gap and having a larger opening cross-section than the washing gap, wherein the backwash device has a hollow shaft partially movable in relation to the backwash body and rotatable for connecting the washing gap or suckaway slot to the sludge discharge as a function of the relative position between the backwash body and the hollow shaft.
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